Here is the full list of all 38 HELLDIVERS 2 achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Complete at least 100 missions.
Kill 100 enemies using fire damage during the same mission.
Upgrade all ship modules at least 1 level.
Reach max level on one ship module.
Throw back a live grenade.
Play at least 50 missions.
Heal another player using stims.
Extract at least 15 rare samples from a mission as a team.
Kill 5,000 enemies.
Customize your Helldiver with new cape, armor, and helmet.
Defeat a Bile Titan
Kill a bug warrior with a shotgun within 1 meter.
Complete a Stalker Hive tactical objective.
Kill 25 enemies with one stratagem.
Fly at least 25 meters from the shockwave of an explosion.
Complete 10 tactical objectives.
Extract after the timer reaches zero.
Extract with a full team on a Hard difficulty or more mission.
Fire at least 150 rounds in one burst, killing at least 10 enemies.
Kill a target at a distance of over 100m.
Play 1 Bug Mission.
Play a planet defense mission.
Extract with at least 15 common samples.
Defeat a Hulk.
Extract from a mission during nighttime.
Kill 150 enemies during the same mission.
Play 1 Bot Mission.
Complete a mission but fail to extract.
Complete Basic Training.
Complete an Extreme difficulty mission or higher without anyone dying.
Complete a full Hard difficulty mission or higher without anyone firing their primary or support weapon.
Complete a full Extreme difficulty Blitz mission and extract in under 6 minutes.
Kill a Charger with a resupply pod.
Have 6 orbital barrage stratagems in the same place at the same time.
Be injured in all limbs at the same time.
Shoot off both arms on a Hulk and then extract while it's alive.
While using a jump pack, knock yourself into a ragdoll state.
Provide assisted reload for a teammate.